Vader relies on the complex life support system of his suit to survive and it happens to be very vulnerable to electrical discharges. So, if Vader ever had unleashed Force lightning, there's a good chance it would've caused his suit to short circuit, thus, killing him.
Darth Vader is one of the most powerful and insidious villains in Star Wars canon. Fewer antagonists are more memorable than this wheezing, fallen Jedi. However, he never once in the main films uses Force Lightning, the iconic weapon of Sith throughout canon.
It's likely Kylo never learned how to summon Force Lightning
He would teach and tell Kylo only what he wanted to, making sure that he stayed within limits and would certainly never get to the point of almost destroying him as Anakin did — therefore neglecting training in Force lightning.
Weakness: Electricity
A lot of the systems that were keeping Darth Vader alive were maintained by electricity, which is why Force lightning was so destructive towards him.
Darth Vader's Insecurities are His Biggest Weaknesses
In the end, virtually all who have made the attempt to use Vader's cybernetic nature against him have ended up dead or defeated. The elite few who have had the upper hand, even before his conversion to mechanical monstrosity, have done so by dominating him mentally.
Star Wars Confirms Darth Vader Was ALWAYS Obsolete, Thanks to Palpatine. While Emperor Palpatine seemingly did everything in his power to keep Anakin alive, he still made sure to nerf a major part of Darth Vader.
Grandmaster Yoda himself was capable of summoning force lightning in the form of Emerald Lightning. Galen Marek was an extremely skilled user of this Force power, even after his conversion to the light side, rivaling Darth Sidious.
While Jedi could create Force lightning, like Sith, they choose not to use that power due to its association with the dark side and immoral nature. Despite being equally as strong in the Force, one innately Sith ability that Jedi in the Star Wars franchise do not wield is Force lightning.
Let's be honest - it's not as if Yoda is going to have forgotten about that time back on Coruscant where Palpatine nearly fried him with lightning, so the logical answer seems to be that he didn't want to distract Luke with anything such as "watch out for this, that and the other" - he reminds Luke that the Emperor is ...
1 Darth Sidious
As well as being a gifted bladesman Sidious' connection to the Dark Side is extremely powerful, granting Sidious the ability to conduct force lightning.
Over the decades, For lightning has become strongly associated with the Sith. Palpatine is particularly fond of this power, using it to most spectacular effect in Star Wars: The Rise of Skywalker.
Given Rey's lineage as Palpatine's granddaughter, it is also reasonable to assume she is already better attuned to using Force Lightning than the average Force user, with Ben telling Rey that she has all of Palpatine's power within her at the beginning of The Rise of Skywalker.
Palpatine carried the lightsaber for a great deal of his life afterward, though he only rarely wielded it in combat, as his position as Emperor made battles with other Force-users few and far between, and he preferred to rely on his raw ability with the Force in any case.
Darth Krayt, Darth Wyyrlok, Karness Muur, Grand Master Yoda, Galen Marek and Revan were able to catch Force lightning with their bare hands. The latter three could also deflect Force Lightning back to its source.
It's the intensity of reflected lightning and the channelling of such raw dark side power that are the catalysts for Palpatine's transformation. Perhaps the face that boils up to the surface is shaped by his dark side corruption, but the lightning is definitely the cause.”
While he never showed the ability to use Force lightning before, it's appearance here helps communicate Kylo Ren's shift in his allegiance, and it's presently the only canon instance of Kylo using such an ability.
Without question, the most powerful Force ability present in Star Wars is the Thought Bomb. It is created through an ancient Sith ritual where the Sith combine their dark side powers. If done successfully, the Thought Bomb can destroy all Force-sensitive beings unfortunate enough to be within the radius of its blast.
The true Force-form of Darth Vader explains why he can't use Force Lightning. Conceived by the will of the Force itself, and with a midi-chlorian count so high it was greater than even Master Yoda's, Anakin Skywalker was the greatest Jedi Knight of his generation.
Master Yoda has risen above all others to claim the top spot as the most powerful Jedi of all time and the true chosen one according to IGN's audience. He won pretty handily as well, as he was victorious in 89,756 of his 95,243 battles and had a win percentage of 94.2%.
because he viewed it as a weapon that was more of a jewelry piece than anything substantial. an artifact of old that he could not use and Vader constructed a weapon and sidious hated Vader's lightsaber because it represented. the last remnants of Anakin Skywalker.
Darth Vader's Suit Embeds Needles In His Skin
Unfortunately, these needles, which transmit neurological data throughout his body and allow him to control his limbs, also cause him constant pain. Between the never-ending itchiness and walking around with needles in his skin, it's no wonder he is so angry.
Palpatine specifically designed the suit to both make Vader feel pain, so he could channel the darkside, but also to limit his power. If Vader was able to access his full potential and immerse himself completely in the force, he would have no trouble overthrowing Palpatine...
Gray Jedi commonly demonstrated their skills with both Light and Dark side Force capabilities. For example, the capacity to construct a lightsaber from scratch, along with unique Force talents such as Force lightning.